#include "pch.h"
#include "TextureHelper.h"

using namespace gsl;
using namespace DirectX;

namespace Library
{
	Point TextureHelper::GetTextureSize(not_null<ID3D11Texture2D*> texture)
	{
		D3D11_TEXTURE2D_DESC textureDesc;
		texture->GetDesc(&textureDesc);
		
		return Point(textureDesc.Width, textureDesc.Height);
	}

	Rectangle TextureHelper::GetTextureBounds(not_null<ID3D11Texture2D*> texture)
	{
		D3D11_TEXTURE2D_DESC textureDesc;
		texture->GetDesc(&textureDesc);

		return Rectangle(0, 0, textureDesc.Width, textureDesc.Height);
	}

	uint32_t TextureHelper::BitsPerPixel(const DXGI_FORMAT format)
	{
		switch (format)
		{
		case DXGI_FORMAT_R32G32B32A32_TYPELESS:
		case DXGI_FORMAT_R32G32B32A32_FLOAT:
		case DXGI_FORMAT_R32G32B32A32_UINT:
		case DXGI_FORMAT_R32G32B32A32_SINT:
			return 128;

		case DXGI_FORMAT_R32G32B32_TYPELESS:
		case DXGI_FORMAT_R32G32B32_FLOAT:
		case DXGI_FORMAT_R32G32B32_UINT:
		case DXGI_FORMAT_R32G32B32_SINT:
			return 96;

		case DXGI_FORMAT_R16G16B16A16_TYPELESS:
		case DXGI_FORMAT_R16G16B16A16_FLOAT:
		case DXGI_FORMAT_R16G16B16A16_UNORM:
		case DXGI_FORMAT_R16G16B16A16_UINT:
		case DXGI_FORMAT_R16G16B16A16_SNORM:
		case DXGI_FORMAT_R16G16B16A16_SINT:
		case DXGI_FORMAT_R32G32_TYPELESS:
		case DXGI_FORMAT_R32G32_FLOAT:
		case DXGI_FORMAT_R32G32_UINT:
		case DXGI_FORMAT_R32G32_SINT:
		case DXGI_FORMAT_R32G8X24_TYPELESS:
		case DXGI_FORMAT_D32_FLOAT_S8X24_UINT:
		case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS:
		case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT:
		case DXGI_FORMAT_Y416:
		case DXGI_FORMAT_Y210:
		case DXGI_FORMAT_Y216:
			return 64;

		case DXGI_FORMAT_R10G10B10A2_TYPELESS:
		case DXGI_FORMAT_R10G10B10A2_UNORM:
		case DXGI_FORMAT_R10G10B10A2_UINT:
		case DXGI_FORMAT_R11G11B10_FLOAT:
		case DXGI_FORMAT_R8G8B8A8_TYPELESS:
		case DXGI_FORMAT_R8G8B8A8_UNORM:
		case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
		case DXGI_FORMAT_R8G8B8A8_UINT:
		case DXGI_FORMAT_R8G8B8A8_SNORM:
		case DXGI_FORMAT_R8G8B8A8_SINT:
		case DXGI_FORMAT_R16G16_TYPELESS:
		case DXGI_FORMAT_R16G16_FLOAT:
		case DXGI_FORMAT_R16G16_UNORM:
		case DXGI_FORMAT_R16G16_UINT:
		case DXGI_FORMAT_R16G16_SNORM:
		case DXGI_FORMAT_R16G16_SINT:
		case DXGI_FORMAT_R32_TYPELESS:
		case DXGI_FORMAT_D32_FLOAT:
		case DXGI_FORMAT_R32_FLOAT:
		case DXGI_FORMAT_R32_UINT:
		case DXGI_FORMAT_R32_SINT:
		case DXGI_FORMAT_R24G8_TYPELESS:
		case DXGI_FORMAT_D24_UNORM_S8_UINT:
		case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
		case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
		case DXGI_FORMAT_R9G9B9E5_SHAREDEXP:
		case DXGI_FORMAT_R8G8_B8G8_UNORM:
		case DXGI_FORMAT_G8R8_G8B8_UNORM:
		case DXGI_FORMAT_B8G8R8A8_UNORM:
		case DXGI_FORMAT_B8G8R8X8_UNORM:
		case DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM:
		case DXGI_FORMAT_B8G8R8A8_TYPELESS:
		case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
		case DXGI_FORMAT_B8G8R8X8_TYPELESS:
		case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
		case DXGI_FORMAT_AYUV:
		case DXGI_FORMAT_Y410:
		case DXGI_FORMAT_YUY2:
			return 32;

		case DXGI_FORMAT_P010:
		case DXGI_FORMAT_P016:
			return 24;

		case DXGI_FORMAT_R8G8_TYPELESS:
		case DXGI_FORMAT_R8G8_UNORM:
		case DXGI_FORMAT_R8G8_UINT:
		case DXGI_FORMAT_R8G8_SNORM:
		case DXGI_FORMAT_R8G8_SINT:
		case DXGI_FORMAT_R16_TYPELESS:
		case DXGI_FORMAT_R16_FLOAT:
		case DXGI_FORMAT_D16_UNORM:
		case DXGI_FORMAT_R16_UNORM:
		case DXGI_FORMAT_R16_UINT:
		case DXGI_FORMAT_R16_SNORM:
		case DXGI_FORMAT_R16_SINT:
		case DXGI_FORMAT_B5G6R5_UNORM:
		case DXGI_FORMAT_B5G5R5A1_UNORM:
		case DXGI_FORMAT_A8P8:
		case DXGI_FORMAT_B4G4R4A4_UNORM:
			return 16;

		case DXGI_FORMAT_NV12:
		case DXGI_FORMAT_420_OPAQUE:
		case DXGI_FORMAT_NV11:
			return 12;

		case DXGI_FORMAT_R8_TYPELESS:
		case DXGI_FORMAT_R8_UNORM:
		case DXGI_FORMAT_R8_UINT:
		case DXGI_FORMAT_R8_SNORM:
		case DXGI_FORMAT_R8_SINT:
		case DXGI_FORMAT_A8_UNORM:
		case DXGI_FORMAT_AI44:
		case DXGI_FORMAT_IA44:
		case DXGI_FORMAT_P8:
			return 8;

		case DXGI_FORMAT_R1_UNORM:
			return 1;

		case DXGI_FORMAT_BC1_TYPELESS:
		case DXGI_FORMAT_BC1_UNORM:
		case DXGI_FORMAT_BC1_UNORM_SRGB:
		case DXGI_FORMAT_BC4_TYPELESS:
		case DXGI_FORMAT_BC4_UNORM:
		case DXGI_FORMAT_BC4_SNORM:
			return 4;

		case DXGI_FORMAT_BC2_TYPELESS:
		case DXGI_FORMAT_BC2_UNORM:
		case DXGI_FORMAT_BC2_UNORM_SRGB:
		case DXGI_FORMAT_BC3_TYPELESS:
		case DXGI_FORMAT_BC3_UNORM:
		case DXGI_FORMAT_BC3_UNORM_SRGB:
		case DXGI_FORMAT_BC5_TYPELESS:
		case DXGI_FORMAT_BC5_UNORM:
		case DXGI_FORMAT_BC5_SNORM:
		case DXGI_FORMAT_BC6H_TYPELESS:
		case DXGI_FORMAT_BC6H_UF16:
		case DXGI_FORMAT_BC6H_SF16:
		case DXGI_FORMAT_BC7_TYPELESS:
		case DXGI_FORMAT_BC7_UNORM:
		case DXGI_FORMAT_BC7_UNORM_SRGB:
			return 8;

#if defined(_XBOX_ONE) && defined(_TITLE)

		case DXGI_FORMAT_R10G10B10_7E3_A2_FLOAT:
		case DXGI_FORMAT_R10G10B10_6E4_A2_FLOAT:
			return 32;

		case DXGI_FORMAT_D16_UNORM_S8_UINT:
		case DXGI_FORMAT_R16_UNORM_X8_TYPELESS:
		case DXGI_FORMAT_X16_TYPELESS_G8_UINT:
			return 24;

#endif // _XBOX_ONE && _TITLE

		default:
			return 0;
		}
	}
}
